The music world has changed a lot in recent decades and it truly isn’t all about getting a chair in an orchestra. The Internet has had a big effect, of course. Many musicians free lance or play in multiple ensembles, some teach, some do outreach work and some have day jobs. I know a trombonist who got a BM and then went to work at a tv station, a jazz player who went to medical school, and many people who mix different kinds of gigs: our local music teacher also plays in a regional orchestra and is part of a popular indie rock/cabaret band. He has kids now and seems to be making it work. Music students are known for their discipline and are welcomes in all kinds of fields, as well.
There are some good books online about making a career in music. I bought a couple and they were encouraging.
My kid used to go to her teacher and say, “over the weekend I really tried to quit music but I couldn’t.”